Possible alternate energy source

[lesher]

1st of all, I'm not really sure if this thread is already on the right place, but I think this is the most possible place for my thread (well, if it's not, it can be moved :D)

Anyway, here goes:
As we know, many alternate energy sources are being developed, such as hydrogen fuel, solar energy, air pressure, ocean wave power plant, etc2..

-> Now, which one is going to be the most possible option in the near future? Oh, don't use dangerous energy such as nuclear.

List (for now):
- Hydrogen fuel
- Solar cell
- Air pressure
- Ocean wave power plant

Might be added more later

If you can add more ideas, you're more than welcome :yes:
I'm curious about what people gonna write here :D

[INFERNO]

All of them require some amount of pollution to be produced (i.e. solar power, hydrogen fuel cell) or damages the environment (i.e. hydroelectricity). As for air pressure electricity, I believe pollution is produced also when making the necessary components (same for solar and hydrogen fuel powers). There's also wind energy and geothermal heating (perhaps usable as energy source) too.

I'm going with solar power, hydrogen fuel cell and wind. Ocean wave electricity I'm unsure on, as the object was to minimize environmental damage and I'm not sure how much the construction for that damages the environment. Hydroelectricity though involves flooding areas, which does allow for aquatic life but kills off plenty of organisms in the process.